Insulator fitting



March 12, 1929. E. H. JACOBS INSULATOR FITTING Filed July 11, 1921 .Gfilwei 21307:

* na si'ii ciigmbs By WM aiiozzneys Patented Ma r. 12, 1929.

UNITED STATES 1,705,253 PATENT OFFICE.

ERNEST H. JACOBS, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELECTRICAL ENGINEERS EQUIPMENT CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

INSULATOR FITTING.

Application filed July 11,

My invention relates to electrical equipment, and more specifically to current carrying and distributing means, and the supporting means therefor.

One object of my invention is to provide improved means for mounting switches and similar equipment on supports from which they must be insulated.

Another object is to provide an insulator of simplified shape, and suitable fittings Y shaped to co-operate therewith.

In the art to which my invention relates, slight changes of the shape may be made to contribute largely to saving in the cost of manufacture and to increased durability and serviceability of the product. In originating the device herein described, I have attempted to obtain the greatest possible simplicity consistent with facility in manufacture and assembly. Further objects and advantages of my invention will become apparent as the description proceeds.

The present application is a continuation in part of my copending application, Serial No. 240,942, filed June 20, 1918, which application has resulted in Patent 1,463,320, July 31, 1923. I f

In the embodiment of my invention selected for illustration,

Figure 1 is'a plan view, and

Figure 2 is a side elevation partly in section, of a switch, and fittings therefor, according to my invention. The switch shown may obviously be mounted on a ceiling, wall, floor, or other suitable support, its function ing being entirely identical regardless of its orientation.

' "In the embodiment of my invention, selected for illustration, the insulators employed comprise a corrugated body portion 10, in which oppositely opening sockets 12 are formed, which sockets taper inwardly and are substantially similar or, if desired, duplicate. The ends of the outer periphery of the body are also conical, being flared outwardly, as at 14 and 16. These portions are also similar inconfiguration, and may obviously be made identical, although I prefer to form one end slightly smaller than the other as shown. The common support 18 for both insulators is provided with a tapered projection 20 adapted to enter the socket 12, and with a reversely tapered socket 22, adapted to receive the end portion 14 of the insulator. When these parts are fastened together by'the usual 1921. Serial No. 483,726.

cement 24, the crushing strength of the cement, in addition to its frictional grip on the surfaces of the juxtaposed parts will operate to prevent relative displacement and hold the parts firmly in assembled position. The opposite end of the insulator is similarly cemented to a cap, having a central projection 28 corresponding to projection 20 on plate 18, and a socket 30 similar tosocket 22.

From the foregoing the extreme simplicity of the supporting means I have provided will be apparent. It should be noted that between the'support and the knife blade only three elements are interposed, to wit, the insulator body,the cap 26 and the fitting mounted on the cap.

Without further elaboration, the forego ing will so fully explain the gist of my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service, without departing. from certain features which may properly be said to constitute the essential items of novelty involved, which items are intended to be defined and secured to me by the following claims.

vI claim:

1. In combination, a supporting base having a tapered socket with its largest diameter at the bottom of the socket and its smallest diameter at the outer open end of the socket, a mounting stud integral with and projecting axially from the bottom of said socket, said stud being tapered reversely with reference to the taper of said base socket, an insulator having a socketed endadapted to enter said base socket over said stud, said insulator having a regular external taper at its base end with the largest diameter of the taper approximately equal to the smallest diameter of the base socket and disposed at the end of the insulator, the integral base stud being of regular tapered formation from one end to the other with its smallest diameter'at the bottom of the base socket and its largest diameter at the outer free end of the stud and the insulator socket openingaxially into one end of the insulator and tapered reversely with respect to the external taper of the adjacent end of the insulator with its smallest diameter disposed at the end of the insulator and approximately equal to the largest diameter of the outer end of the stud, said socket being of regular tapered formation from its outer end to its inner end and cementitions 'ing tapered socket below its upper wall, an

' integral mounting post extending up from 2 f" the base of said socket and'tapered reversely with reference to said socket, and an insulator provided with a tapered socket, for receiving said post and cemented thereon and with an externally reversely tapered end cemented in said base socket, the tapered insulating socket and reversely tapered base post and the tapered base socket and reyersely' tapered insulator end connections both serving to join the insulator to the base.

In witness whereof, I hereunto subscribe this 5th day of July," 1921.

ERNEST H. JACOBS. 

